// <script Language="JavaScript">
// Functie om te controleren of alle velden zijn ingevuld.

function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
	result = true;
  }
  return result;
}

function validRequired(formField,fieldLabel)
{
	var result = true;
	
	if (formField.value == "")
	{
		alert('Vul een waarde voor het veld "' + fieldLabel +'" in.');
		formField.focus();
		result = false;
	}
	
	return result;
}

function validEmail(formField,fieldLabel,required)
{
	var result = true;
	
	if (required && !validRequired(formField,fieldLabel))
		result = false;

	if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
	{
		alert("Vul een compleet Email adres in het veld E-MAIL  : uwnaam@uwdomain.nl ");
		formField.focus();
		result = false;
	}
  return result;
}


function validNum(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var num = parseInt(formField.value);
 		if (isNaN(num))
 		{
 			alert('Het veld "' + fieldLabel +'"  moet nummeriek zijn.');
			formField.focus();		
			result = false;
		}
	} 
			return result;
}

function validDate(formField,fieldLabel,required)
{
	var result = true;

	if (required && !validRequired(formField,fieldLabel))
		result = false;
  
 	if (result)
 	{
 		var elems = formField.value.split("/");
 		
 		result = (elems.length == 3); // should be three components
 		
 		if (result)
 		{
 			var month = parseInt(elems[0]);
  			var day = parseInt(elems[1]);
 			var year = parseInt(elems[2]);
			result = !isNaN(month) && (month > 0) && (month < 13) &&
						!isNaN(day) && (day > 0) && (day < 32) &&
						!isNaN(year) && (elems[2].length == 4);
 		}
 		
  		if (!result)
 		{
 			alert('Vul een datum in het formaat MM/DD/YYYY in het veld "' + fieldLabel +'" in.');
			formField.focus();		
		}
	} 
	
	return result;
}

function validateForm(theForm)
{
	// Customize these calls for your form

	// Start ------->

	if (!validNum(theForm.Lidnummer," Lidnummer ",true))
		return false;
	if (!validRequired(theForm.Wachtwoord," Wachtwoord "))
		return false;

	// <--------- End
	
	return true;
}

// </script>